起波配筋混凝土框架结构的抗内爆性能数值模拟

尹华伟; 陈本政

doi:10.11858/gywlxb.20230712

起波配筋混凝土框架结构的抗内爆性能数值模拟

doi: 10.11858/gywlxb.20230712

尹华伟^{1, 2,},
陈本政¹

1.
湖南大学土木工程学院，湖南长沙　410082
2.
湖南湖大土木建筑工程检测有限公司，湖南长沙　410082

基金项目: 国家重点研发计划（2016YFC0701405）

详细信息

作者简介:
尹华伟（1972－），男，博士，副教授，主要从事爆炸与冲击动力学研究. E-mail：yhwzzy@163.com

中图分类号: O347; TU352.1
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- 文章访问数: 163
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- PDF下载量: 28
出版历程
- 收稿日期: 2023-08-14
- 修回日期: 2023-09-06
- 录用日期: 2023-11-15
- 网络出版日期: 2024-01-25
- 刊出日期: 2024-02-05

Numerical Simulation on Internal Explosion Resistance of Concrete Frame Structures with Kinked Rebar

YIN Huawei^{1, 2
,},
CHEN Benzheng¹

1.
College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China
2.
Civil Engineering Inspection and Test Limited Company of Hunan University, Changsha 410082, Hunan, China

摘要

摘要: 人工塑性铰在框架结构抗震研究中已经得到广泛应用，其能够控制梁塑性铰出现的位置，避免框架结构在地震中出现梁柱节点破坏而发生连续倒塌，实现“强柱弱梁”的设计目标。一种新型起波钢筋构造的人工塑性铰为结构抗爆设计提供了新的思路。现有的结构静载试验表明，起波钢筋兼具优异的变形性能和较强的极限承载力。采用简化混合建模的方法，基于有限元分析软件ANSYS/LS-DYNA，对采用不同起波配筋方案的钢筋混凝土框架结构进行数值模拟。研究结果表明：在爆炸荷载作用下，起波配筋梁能有效地吸收冲击力，降低支座反力，推迟反力峰值出现时间，保护梁柱节点，将破坏限制在梁板构件，从而防止结构发生连续倒塌。
- 冲击荷载 /
- 内部爆炸 /
- 起波钢筋 /
- 框架结构 /
- 有限元分析
Abstract: Artificial plastic hinges have been widely used in the seismic research of frame structures, which can control the location of the beam plastic hinges and avoid the continuous collapse of the frame structure due to the damage of beam-column joints in earthquakes. The design goal of “strong column weak beam” can be achieved. An artificial plastic hinge with kinked rebar provides a new idea for structural blast resistance. Established structural static load tests have shown that the kinked rebar has excellent deformation performance. The ultimate load capacity of beam with kinded rebar is not reduced. With the software ANSYS/LS-DYNA and the hybrid finite element modeling approach, a numerical simulation study of reinforced concrete frame structures with different kinked rebar schemes was carried out. The results showed that the beam with kinked rebar can absorb the impact energy, reduce the support reaction, delay the peak reaction force, protect the beam-column joints, limit the damage to beam-slab members, and prevent the continuous collapse of frame structre.
- impact loading /
- internal explosion /
- kinked rebar /
- frame structure /
- finite element analysis

HTML全文

图 1 起波钢筋拉伸特性曲线^[2]

Figure 1. Kinked rebar tensile behavior curve^[2]

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图 2 起波配筋梁的荷载-位移曲线^[2]

Figure 2. Kinked rebar beam load-deflection curves^[2]

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图 3 试件构造

Figure 3. Specimen structure

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图 4 简化柱截面示意图

Figure 4. Schematic diagram of simplified column

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图 5 简化分层板示意图

Figure 5. Schematic diagram of simplified layering slab

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图 6 1/8缩尺模型

Figure 6. 1/8 scale model

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图 7 数值模型重力

Figure 7. Gravity of numerical model

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图 8 0.4 kg TNT起爆

Figure 8. 0.4 kg TNT explosion

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图 9 1.0 kg TNT起爆

Figure 9. 1.0 kg TNT explosion

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图 10 框架结构数值模型（单位：mm）

Figure 10. Numerical model of frame structure (Unit: mm)

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图 11 等效起波钢筋位置（单位：mm）

Figure 11. Equivalent kinked rebar location (Unit: mm)

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图 12 HRB400起波钢筋的等效应力-应变关系

Figure 12. Equivalent stress-strain relation of HRB400 kinked rebar

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图 13 框架结构加载阶段

Figure 13. Frame structure loading phase

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图 14 梁柱节点支座反力

Figure 14. Support reaction of beam-column joint

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图 15 框架细化区的破坏情况

Figure 15. Detailed damage of the frame refined region

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图 16 框架梁爆炸后的竖向位移

Figure 16. Post-explosion vertical displacement of beam

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图 17 测点F2的竖向位移

Figure 17. Vertical displacement of measuring point F2

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表 1 钢筋和混凝土材料参数

Table 1. Rebar and concrete material parameter

Concrete (K&C) Rebar (*MAT_PLASTIC_KINMATIC)

ρ₀/(kg·m⁻³) μ f_c/MPa ρ₀/(kg·m⁻³) μ E/GPa f_y/MPa C/s⁻¹ P ε_f

2 400 0.2 36 7 800 0.2 206 320 40 5 0.14

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表 2 空气材料参数

Table 2. Air material parameters

ρ₀/(kg·m⁻³) C₀ C₁ C₂ C₃ C₄ C₅ C₆ E₀/(J·m⁻³) V₀

1.29 0 0 0 0 0.4 0.4 0 2.5 $\times$ 10⁵ 1

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表 3 TNT材料参数

Table 3. TNT material parameters

ρ₀/(kg·m⁻³) D/(m·s⁻¹) p_CJ/GPa A/GPa B/GPa R₁ R₂ $\omega$ E₀/(J·m⁻³) V₀

1 630 6 930 21 373.8 3.747 4.15 0.9 0.35 7 $\times$ 10⁹ 1

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表 4 CFRP材料参数^[20]

Table 4. Material parameters of CFRP^[20]

ρ₀/(kg·m⁻³) E_A/GPa E_B/GPa μ_BA μ_CA μ_CB G_AB/GPa G_BC/GPa

1600 130 9 0.021 0.021 0.3 7.620 7.62

G_CA/GPa X_C/MPa X_T/MPa Y_C/MPa Y_T/MPa S_C/MPa CRIT

7.62 1450 2 080 180 87 104 54

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参考文献(21)

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Concrete (K&C)			Rebar (*MAT_PLASTIC_KINMATIC)
ρ₀/(kg·m⁻³)	μ	f_c/MPa	ρ₀/(kg·m⁻³)	μ	E/GPa	f_y/MPa	C/s⁻¹	P	ε_f
2 400	0.2	36	7 800	0.2	206	320	40	5	0.14

ρ₀/(kg·m⁻³)	C₀	C₁	C₂	C₃	C₄	C₅	C₆	E₀/(J·m⁻³)	V₀
1.29	0	0	0	0	0.4	0.4	0	2.5 $\times$ 10⁵	1

ρ₀/(kg·m⁻³)	D/(m·s⁻¹)	p_CJ/GPa	A/GPa	B/GPa	R₁	R₂	$\omega$	E₀/(J·m⁻³)	V₀
1 630	6 930	21	373.8	3.747	4.15	0.9	0.35	7 $\times$ 10⁹	1

ρ₀/(kg·m⁻³)	E_A/GPa	E_B/GPa	μ_BA	μ_CA	μ_CB	G_AB/GPa	G_BC/GPa
1600	130	9	0.021	0.021	0.3	7.620	7.62

G_CA/GPa	X_C/MPa	X_T/MPa	Y_C/MPa	Y_T/MPa	S_C/MPa	CRIT
7.62	1450	2 080	180	87	104	54

起波配筋混凝土框架结构的抗内爆性能数值模拟

doi: 10.11858/gywlxb.20230712

作者简介: 尹华伟（1972－），男，博士，副教授，主要从事爆炸与冲击动力学研究. E-mail：yhwzzy@163.com

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Numerical Simulation on Internal Explosion Resistance of Concrete Frame Structures with Kinked Rebar

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作者简介:
尹华伟（1972－），男，博士，副教授，主要从事爆炸与冲击动力学研究. E-mail：yhwzzy@163.com